Real Madrid played well against Osasuna. The problem Real Madrid had in that match is that Real Madrid didn't create good chances against Osasuna, and it made Real Madrid not score plenty of goals against Osasuna. I know it's too early to judge Real Madrid, but they need to create good chances in their next matches if they want to beat their opponents easily, but if they continue with how they played against Osasuna, they will find it difficult to win their matches this season.
That is right that even though they had ball much they did not create many good chances to score. This is real concern especially for team with high hopes. We know they won but they need to fix their attack. As you mentioned team that wants to win trophies can not just rely on great individual plays. They must have ability to break through defenses. Creating better chances will be good for them as season goes on.